Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5ccb07153327b7…

MALICIOUS

PDF

83.6 KB Created: 2021-09-07 17:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7f0fadcfe83e4d2c75d630c5efb917a5 SHA-1: dbebb616beb260648269d720d2e722c5998c2dd9 SHA-256: ec5ccb07153327b74f16fab3681080df02308a6e71c9dc7f9c0fe6c20286ef61
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised WordPress upload storage, suggesting it is designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16088b9d5be703---95053875724.pdf In PDF document text
    • https://hifi-markt.eu/kunden/kronhardt/ckfinder/userfiles/files/3141926507.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/59183151023.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/477dd477e700601681cd8684fc44f5a4/mipapidipidiwebotekeveke.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/wadojuboloze.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c109c3675b3---nutewikunamek.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8b1638ee7---lizexuloluvusapuj.pdfIn PDF document text
    • http://bruningfoundation.com/clients/9/99/99acc79c432c4c389b364f5b25189af3/File/26422197274.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/vuzubuxopodokiwejolaxul.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607805c25fad8---dibebemibugevunipup.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16071bb66e27f5---wejaxomepakamigo.pdfIn PDF document text
    • http://opersan.com/file/23895922909.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a676ba967e2---piladibegoxuzov.pdfIn PDF document text
    • http://scpt.it/userfiles/files/defeno.pdfIn PDF document text
    • https://securitydm.com/slicice/file/muvamab.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/5in5k3niao3gehn43dq61ph5n4/sumatuvezanafekato.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/jimigovexuvixikosag.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/60904893470.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/kujuvejomuruwopip.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/17414626428.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/lelagadesekiv.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/17458968285.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/42f3c2a153d9cbd0566676f2822810c2/teboko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=analytical+method+validation+and+instrument+performance+verification+pdf+freePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE168 17192 bytes
SHA-256: 8e177f57d7d5ecb243591f8d25d298d8df828b550d78d9fdd943172891320648
font_01_sfnt_off00010dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E7 11144 bytes
SHA-256: 075194e3cf19363d6ee11d16d3307037d9267d27e23d1dda3658ec4bbad2254b

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